Sawing-machine



Patented Mar. 2i, I899; E. S. CLARKE.

SAWING MACHINE.

(Application filed May 24 1898.) (No Model.)

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No. 62|,488. Patented Mar. 2|, I899.

E. S. CLARKE. SAWING MACHINE. (Application filed m 24, 1898.)

5 Sheets-Sheet 2.

(No Model.)

INVENTOR} WITNESSES:

IdwaraZJwww/wld C'zr/Ea a ATTORNEYS m: NORRIS PETERS co. Fupmu'mmMsHmcTM. Dv c:

No. 62!,488. Patented Mar. 2|, I899.

E. S.- CLARKE.

SAWING MACHINE.

(Application filed May 24 1898.) (No Model.) 5 Shears-Sheet a.

' WITNESSES: k INVEN T038 0 I .Zdzoaraflummefaid ldrle.

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E. S. CLARKE.

SAWJNG MACHINE. (Apphcat lon filed May 24 1898) Patented Mar. 2!, I899.

5 Sheets-Sheet 4.

(No Model.)

INVENTOR.

Edwardflammerfiafl L'hrle WITNESSES:

BY SW;- SW

4,, AT TORNEYS.

No. 62!,488. I Patented Mar. 2l,' I899.

E. s. CLARKE.

SAWING MACHINE.

- (Application filed May 24, 1898.) v (No Model.) v 5 Sheets-Sheet 5.

WITNESSES: INVENTOR.

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YHE NORRIS PETERS 0Q, PHOInLbTHO.WASNINGTON, By C tended chiefly to sawinto section iesse ing-machines are used.

FFICE.

PATENT EDWVARD SUMMERFIELD CLARKE, OF RICHMOND, VIRGINIA.

SAWlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 621,488, dated March21, 1899.

Application filed May 24, 1898. Serial No. 681,561. (No model.)

' To all whom itmay concern.-

Be it known that I, EDWARD SUMMERFIELD CLARKE, a citizen of the UnitedStates of America, and a resident of Richmond cit-y, 5 State ofVirginia, have invented certain new [0 wherein are employed a number ofcircular saws mounted on a shaft and wh' r g undressed lumber, logs,&c., but which may be applied to other purposes for which saw- In thedrawings which form a part of this specification, and in which likefigures refer to like parts, Figure l is a plan view of my improvedsawing-machine. Fig. 2 is a side elevation of the machine. Fig. 3 isabroken plan of the machine for use as a reference. Fig. 4 is alongitudinalsection of the machine on the linew y in Fig. 1. Fig. 5 is adetail in perspective showing the log-holder. Fig. 6

is a detail in perspective showing the cam- 0 Fig. 8 is a detail inperspective showing the .automatic clutch. Figs. 9 and 10 show detailsin perspective of the automatic clutch.

In Fig. 1, 1 is the sawing-table, which travels on rollers 2 and uponwhich the logs to be 5 sawed are placed. To thissawing-table is attacheda connecting-rod 3, one end of which is attached to the crank 4, whichin turn is attached to the shaft 5, which is carried and revolvesintermittently in the bearings 6 6.

This intermittently revolving shaft is operatedby means of an automaticclutch in the following manner: Attached to the shaft 5 is a pawl 7,which engages in the notches 8 on the disk 9, which is attached to theconstantly-running gear-wheel 10, which runs loose on the shaft 5 andwhich is driven by means of the pinion 11, attached to the shaft 12,which revolves in bearings 13 13. Fixed on the shaft 12 is thesprocket-wheel 14, which is driven by means of a chain 15 from thesprocket-wheel 16, which is mounted on-the shaft 17, which is driven bymeans of the cone-pulley 18, the belt 19, and the cone-pul ley 20, whichcone-pulley 20 is mounted on the shaft 21, which shaft is driveif fromthe main shaft 22 by means of the belt 23 andthe pulleys 24 and 25.

Now in order to put the sawing-table in motion the operator presses downthe lever 26, and inso doing pulls downward the rod 27, which isattached to'the end of the lever 28, which is pivoted at 29 and theother end of which is provided with an inclined face 30, as shown indetail in Figs. 9 and 10. This end of the lever 28 is thrown upward whenthe lever 26 is depressed. Now when the sawing-table 1 is at rest theend 35 of the pawl 7 rests against the face 31 of the lever 28. Thespring 32 is then in tension and tends to throw the end 36 of the lever7 into gear with the notches 8 of thedisk 9, which is attached to theconstantly-revolving wheel 10. When the operator depresses the lever 26and so raises the end of the lever 28, which has the bevel-face 30, hefrees the pawl 7. The spring '32, acting on the pawl 7, throws its end36 j into gear with the notched disk 9, which, be-

to its original position after the removal of.

the pressureon the lever 26,) and continuing to come down the said end30 of the lever 28 it is forced to one side until it reaches the face 31of the said lever 28, by which time the end 36 of the pawl 7 has beendrawn out of gear with the notcheddisk 9. Inorder to .prevent the pawl 7and the shaft 5 from continuing from their momentum to revolve and sopass the point at which they are shown-in Fig. 9, a friction-brake isused, consisting of a shoe 34, and a set-screw 37, heldin a bracket 33,which is attached to any convenient point, such as the bearing 6. screw37 the shoe 34 can be caused to bear with more or less pressure upon theshaft 5. It will now be seen that by depressing the lever 26 theoperator can cause the shaft 5 and the crank 4 to make one completerevolution. If

after depressing the lever 26 the operator al- By adjusting the set IOO' the cam plates.

lows the said lever to immediately rise again to its original position,the shaft 5 and the crank 4 will make but one revolution; but if theoperator keeps the lever 26 depressed the shaft 5 and the crank 4 willcontinue to revolve as long as he does so. For every complete revolutionof the shaft 5 and the crank 4 the log-carriage 1 makes one completemove in cut forward and back again. I have shown the clutch device inthe present application because it is a part of my machine; but I havenot claimed it, as it will be made the subject of a concurrentapplication with this one. I desire, however, to reserve all my righttherein. Runningin bearingattachedtotheframework 38 is the shaft 39,driven from the main driving-shaft 22 by means of the pulleys 43 and 40and the belts 44. On this shaft 39 are mounted a number of circular saws41, the upper parts of which pass through slots 42 in the log-carriage1.

Attached to the frame of the sawing-machine are rollers 60 60, (seeFigs. 2 and 4,) over which the logs may be run onto the logcarriage 1.

G1 61 are disappearing stops attached to the log-carriage 1 and whichact as stops to bring the logs fairly up to the saws. These stopsoperate in the following manner: Fixed to the framework of the machineand beneath the log-carriage 1 are the cam-plates 62, Figs. 2 and 7, inwhich travel rollers (33, which are attached to the stops 61. As thelog-carriage (shown in Fig. 7 by dotted lines) travels toward thesawsthat is, in the direction indicated by the arrowthe rollers 63 enterthe horizontal path 64 of the cam-plates 62, pass the spring-latches 65,andenter the recesses 66. On the return stroke of the log-carriage therollers 63 are forced to travel down the sloping path 67 of thecam-plates 62 and in doing so lower with them the stops 61, to whichthey are attached. The rollers then travel along the lower horizontalpaths 68 of the cam-plates until they arrive at the open ends, when bymeans of the springs 69 they and the stops ()1 are returned to theiroriginal positions, as shown in Fig. 7.

In order to hold the logs securely while they pass through the saws,log-holders 55 55, having teeth, are provided, which operate in thefollowing manner: The log'holders 55 55, pivoted at and supported by thebracket 56, have at one of their ends the pins 54, which pass throughthe cross-bar48, which cross-bar has at its ends rollers 49 49, adaptedto travel in the cam-path in the cam-plates 51, which are attached tothe framework of the sawing-niachine. These cam plates 51 havespringlatches 52 and 53, which allow of the passage of the rollers 49 49in one direction only in Fixed to the log-carriage are the uprightstandards 45, having slots 46 in their upper parts, which slots formguides for the journaled ends of the crossbar 48. (Shown in detail inFig. 5.) 57 57 are springs used to form a flexible connection betweenthe log-holders and the cross-bar 48, since the inequalities of the logsto be sawed would render a rigid connection unclesirable.

In order to throw the sawed logs from the log carriage, theintermittently-revolving arms 70 70 are provided. These arms, which aregrouped together in threes, are fixed to the shaft 71, which revolves inbearings 72 72. Keyed at one end of the shaft 71 is a ratchetwheel 73,(see Figs. 1 and 2,) which is e11- gaged by a pawl 74, which pawl isattached to a disk 75, carrying the gear-wheel 7b. The disk 75 and thegear-wheel 76 are mounted loose on the shaft 71. Engaging with the gear76 are the teeth 77 of the rack-rod 78, which at its farther end carriesa roller 70, which engages in the cam-path 80 of the camwheel 81. Thiscam-wheel 81 is mounted 011 the intermittently-revolving shaft 5 and isso arranged that for every revolution of itself it will cause the shaft71 to make one-third of a revolution, or just suflicien't to enable oneof the arms 7 O to swing through such an angle as will enable it tothrow from the table any log which may be there.

Having now described and explained the uses of the various parts of myimproved sawing-machine, I will now describe the opera tion of the samein the sawing of logs.

Motion is first of all given to the main shaft 22, which by means of thepulleys 43 43 and 40 40 and the belts 44 44 gives continuous motion tothe saw-shaft 39 and to the saws 41. The main shaft 22 also givescontinuous motion to the shaft 12 through and by means of the pulleys 2425, the belt 28, the shaft 21, the cone-pulley 20, the belt 19, thecone-pulley 18, the shaft 17, the sprocket-wheel 10, the chain 15, andthe sprocket-wheel14. The operator places a log on the log-carriage 1,as shown in Fig. 4. Then depressing the footlever 26 he throws upwardthe beveled end of the lever 28, so freeing the pawl 7, which by meansof the spring 32 is thrown into gear with thecontinuously-revolvingnotched disk 9, and so causes the shaft 5, towhich the pawl 7 is attached, to revolve also. The log-earriage 1, whichis connected to the shaft 5 by means of the crank 4 and theconnecting-rod 3,

is then caused to travel in the direction indicated by the arrow (seeFig. 4) and carries with it and through the saws 41 the legs which areto be sawed,-the latter being held up to the saws by the stops 61 61. ANow as soon as the log-carriage begins to travel in the directionindicated by the arrow the rollers 49 on the cross-bar 48 begin to mountthe inclinedpaths 82 of the cam-plates 51, so depressing the notchedends of the log-holders 55 55 until they bear down upon the logs andfirmly hold them in position. It will be seen in Fig. 1 that alog-holder is placed upon either side of each saw. This is done so-thatafter the log has passed through the saws and has been sawed intosections each section may be firmly held at its ends by the log-holders.By the time the shaft has made half a revolution and when thelog-carriage is at the end of its travel in one direction the rollers 49will have passed the spring-latches 52 and will be at the ends 83 of thecam-paths in the cam-plates,

- log-holders 55 on the logs until when the rollers 49 arrive at thelower parts 50 of the campaths in the cam-plates 51 the notched ends ofthe log-holders 55 are raised clear of the sawed sections of the logs.Now during this return stroke the rollers 63, which are attached to thestops 61, will pass down the inclined part (57'of the cam-paths in thecamplates 62, thus lowering the said stops 61 below the surface of thelog-carriage 1, and so out of the way of the logs. Just at about thistime or at about the time that the shaft 5 has madethree-quarters of onerevolution the cam-wheel 81 is in such a position that its cam-path isbeginning to act on the roller 79 to draw the rack-rod 78 in thedirection indicated by the arrow. (See Fig. 2.) As the-shaft 5 continuesto revolve the said rack-rod is drawn quickly in the directionindicated, and so acting on the gear-wheel 76 and through the pawl 74 onthe ratchet-wheel 73 gives to the shaft 71, and consequently to thedischarging-arms 70 70, a partial turn.

.'The amount of turn given to the shaft 71, de-

pending upon the number of arms in a group, is in this case one-third ofa complete revolution. If thought advisable, the arms could be'groupedin twos or could be mounted singly, in

which cases the operating mechanism would be arranged accordingly. Nowas the shaft 71 makes this partial revolution, the arms revolving withit, the arms 70 will swing downward and discharge the sawed sectionsoflogs from the end of the lo -carriage, the stops (31 being now belowthe surface of the log-carriage and consequently out of the way.Immediately after this has taken place the log-carriage 1 will reachitsoriginal position. The stops 61 will, their rollers 63passing out of thelower parts 68 of the cam-paths in the cam-plates 62, be returned bymeans of the springs 69 to their original positions. The shaft 5 willthen complete its revolution. The

pawl 7 will strike upon the beveled end of' the lever 28 and will bethrown out of gear with the notcheddisk 9, thus causing the machine tostop.

The slots in the log-carriage 1-(see Fig. 1) are intended to show theproper location of the saws when only three are in use. Any number ofthese slots can be cut in the logcarriage, so that any number of sawsmay be used at will and so that they may be spaced at any intervals.

Having now described my invention, what I claim, and desire to secure byLetters Patent of the United States, is

1. In a sawing-machine, the combination of the framework, alog-discharger consisting of arms mounted on a shaft, a shaft supportedby bearings attached to the framework, a ratchet-gear and a spur-gearattached to the shaft and adapted to be engaged and operated by arack-rod, a rack-rod, and a cam to operate the rack-rod. o

2. In a sawing-machine, the combination of the framework, a lo -carriagetraveling in the framework to carry logs to a sawing mechanism,mechanism to operate the log-carriage to cause it to move to and fromthe sawing mechanism, and a log-discharger mounted on anintermittently-revolving shaft supported by the framework and havinggearing adapted to be engaged and be intermittently operated bya rod, arod, and means to operate the'rod, the said means being so arranged thatit will cause the logdischarger to operate to discharge logs from thelog-carriage when the log-carriage is receding from the sawingmechanism.

8. In a sawing-machine the combination of the framework, the saws, thelog carriage traveling in the framework, the clutch-shaft, theclutch-section loose onthe shaft the latter having a crank andconnecting-rod connected with the log-carriage, a clutch-section turningwith the shaft and movable into and out of engagement with the looseclutch-section, an abutment for operating the said mov ableclutch-section, a cam on the shaft, a rod operated by the said cam, theintermittentlyrevolving log-discharger intermittently operated throughgearing by the said rod, the movable stops attached to the log-carriage,camplates attached to the framework to operate the movable stops, thelog-holders, a cross-bar by which to operate the log-holders, camplateson the framework to operate the said cross-bar, and the springs forregulating the pressure of the log-holders on, the logs, substantiallyas shown and described. f. In a sawing-machine, the combination of theframework, camplates attached to the framework and having cam-slotsformed with inclined and horizontal portions, the crossbar for operatingthe log-holders'and being arranged ,to engage at its ends in thecamslots of the cam-plates, standards having vertical slots to guide thecross-bar in a vertical direction, log-holders, springs for forming anelastic connection between the log-holders and the cross-bar, the saws,and the log-carriage traveling in the framework, substantially asdescribed.

Signed by me, at Richmond city, this 30th day of April, 1898.

EDWARD SUllllllERFIELD CLARKE. Witnesses:

J. E. VAUGHAN, ARTHUR SORIVENOR.

